Home / 12,769.58-17,620.75-7,988.60

Finding the Fourth Proportional to 12,769.58, 17,620.75 and 7,988.60

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Solution

The fourth proportional to 12,769.58, 17,620.75 and 7,988.60 is: 11,023.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,769.58 : 17,620.75 = 7,988.60 : x
  2. Step 2: Convert to fraction form
    12,769.58/17,620.75 = 7,988.60/x
  3. Step 3: Cross multiply
    12,769.58x = 17,620.75 × 7,988.60
  4. Step 4: Simplify right side
    12,769.58x = 140,765,123.45
  5. Step 5: Solve for x
    x = 140,765,123.45/12,769.58
  6. Step 6: Final answer
    x = 11,023.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.